JEE main cutoff last year for SC candidates was 54 Marks. This year also you can expect similiar trend .Also your 12th board's percentage is above 65% . You are eligible to clear the cutoff and get a good college.

Last rank to get admission in DTU was around 90k and in NSIT is around 85k for biotechnology. You can check your possibility to get the college by following this link.

Hope it helps. :)