Dear Aspirant, in order to secure NIT, the general percentage should be between 80-90 percentage. The rank should be in between 15000-20,000 in order to get into top NITs. So considering your percentile, I think you can grab a seat in NIT.

Last year the cut off for SC category was 54.01 percentile. This means the candidate having marks above than this cut off is eligible for the advance.

Hope this was helpful.

All the best.