Hi!

Before I go in details. You can check out here for your questions.

And 77 percentile is good enough because minimum cutoff is 68%.

So, for IIT, you can apply JEE Advance. And depending on the rank and score, you'll be determined whether you can get an admission in IIT or not.

Your percentile is good enough for NIT. NIT for this year has minimum cutoff of 72.5% for OBC NCL. But every NIT has their own cutoffs as well for particular courses. For that you have to go through Career360 website and do a bit of research.

And for CIFT, do you mean Central Institute of Fisheries Technology? If Yes, then there's no such information yet regarding its cutoff.