Shriveled is not good.

Let us see the entire tree, please.

I'll get photo up in a bit

Apples will continue to fall off till it's time to harvest. The tree will put out much more flowers than it needs and those flowers will turn into much more fruit than it can handle. Have you thinned any of the apples yet? Mine 8 trees have fruit that are just at your stage and I finished thinning yesterday. Each cluster was thinned down to the best fruit.

Base,

yes, pic of a tree would help. You said it is a dwarf tree. Do you know a rootstock it is grafted on?

" June drop" on apples when it drops some fruitlets is common but it should not drop All fruitlets, partcularly on your 4-5 years old tree.

The more you give us the info, the better. Type of roostock, your location, if you spray it with anything, etc.