Do colleges look at your overall GPA or do they look at certain grades in the 11th grade year?

As long as you have B grades and above, you will be able to get into a good college. Don't worry about that 82% grade. Colleges won't care about it too much. They look at the whole picture not the details. The IB cles should be impressive enough for them. Colleges understand that students don't excel in all topics. A B grade is not the end of the world. I got A's and B's in college and went to a private university. You will be fine.