Hello Pratima,

Yes,the fall in percentile and increase in the number of seats affect the admission process but the competition gets more tuff due to decrease in percentile. The average cutoff marks for SC category student ranges between 130-400 marks in NEET exam.The cutoff may differ from college to college.So as per your mrks you may be eligible for getting a seat but confirmation of seat depends on competition level and vacancy of seats.

hope this may help you.