That makes sense. Let me clarify. I’m just trying to make sure that in two very small sections near the foundation of my house, the rocks that lay against the house slope outwards not inwards so the water slides away from the house. So I was going to add some soil underneath the rocks to prop them off so the water slides away from the house when it rains.

Maybe a picture of the rocks, and that side of the house with something in the picture so the grade can be estimated.

What kind of rocks are we talking about.

Again pictures are required to evaluate the situation.

The fact that you are looking at soil brand, to me indicates that you have little experience in what you are trying to do, SO it may be best to have the talk with the County extension agent (or equivalent ) or some one who has experience in doing this sort of thing

If you're going to remove rocks and put in soil, then replacing rocks, any old bags of "topsoil" from big box stores will work. You will find those bags don't go very far in filling an area. For more soil, look at a landscaping supply who can bring a small truckload. You don't want soil any closer than 6" from siding or other wood, so sometimes you have to look at lowering grade further from house. A picture would help.

@User 1/4" slope per foot would be woefully under the slope required (less than half the grade angle to direct water). It's more like 5/8" per foot. But, you measure out 10', then make sure the slope changes 6" down. That gets you the required 5% slope.

As Seabornman said, you have to start at the exposed 6" dimension of foundation showing as your hold point. Then you work away from the house to slope grade down. Make sure that you don't have "bathtubs" of deeper stone which could hold water against the house.

If you have more problems whisking away water than a couple low spots against the house, you can determine any grades around an entire yard, whether complicated or easy, for about $15 in mason string line, a line level, and (2) 24" rebar.