Generally there is No pre fixed cutoff for competitive exams. Usually the cutoff in any exam depends upon the following factors :
- Number of Seats
- Previous year cutoff trends
- The difficulty level of the exam
- Average marks scored by the candidates
- Number of candidates appeared for the test.
If you can score more than 80 % then it will be considered as good score. if any doubts pls feel free to ask.
All the best !!