UVA and the IB

So I applied to UVA with my predicted scores for my IB exams that I’ll be taking in may and got accepted. I was wondering how many points I could go down for my application to not get rescinded? Like if I was predicted a 37 can I go down to like a 31? Would UVA care at all? Also what would happen if I were to fail my IB exams?

By the way, it’s very likely I won’t fail, but just in case.