I would have an electrician come out and move the outlet boxes from vertical to horizontal ,we had to do that in our kitchen for one and it was no big deal. Or you can have the fabricator cut the backsplash down an inch.

If the electrician can not move the outlet boxes up ask if they can be turned horizontal just above the backsplash and you would only have a minimal drywall repair.

@Jan- Yes it's not fully installed yet. We're just a 30's something couple who had great aspirations of doing a DIY bathroom remodel :) Live and learn! Thanks for the responses. I wasn't sure if it was easy for an electrician to move it up. I will have to check with Cambria about cutting it shorter when they cut the overhang.

You could skip the cambria back splash and go with a tiled wall - tiling around the outlets. It is very easy to move the outlet boxes up, but there will be a bit of sheetrock patching. You have made a great start with your first remodel.

Tiling is a good option but do remember to pull the outlet boxes out to be flush with the face of the tile.

Another suggestion is to leave the outlets where they are and make a cut to both sides of the marble on the wall with a design. Almost like the shape of an L but rounded at the 90" angle. in reverse on the left side. Maybe an ogee edge but larger. It might be easier to slice the marble than deal with switching the box around etc.:) The outlets would have to be the same distance from the edge to make it look uniform. Just an idea of course:)

I always turn my electrical boxes horizontal. You could cut them in to the back splash or modify your backsplash so the plate sits right on top of it. You could also trim the bottom of the plate a little too. But turning them sideways seems to make them look less obtrusive in my opinion.