Greetings,

The entire concept of getting admissions in a good college doesnot merely rest upon the percentage alone. It is just the part of a larger whole. The very idea of a 'best college' relatively depends upon what interests you the most, which course you want to apply for and especially why. 

Scoring between 85-90% will undoubtedly help you secure a seat in any of the good colleges. And not to forget there are tons of options available. However, choosing the best one pertaining to your interests is what will make the difference.

It's your call. Hope for the best and Good wishes.