In 2019, under State Quota, 391 marks secured a seat in UCMS under ST Category. Now this is 2019 data and cut offs change every year. Coffs change every year and are dependant on various factors such as no.of Candidates appearing for the exam, no,of Candidates qualified, top NEET score and difficulty of the exam. So for 2020, you will need atleast 450-500. For any guidance during counselling and admission, you can use our MBBS Companion: https://www.careers360.com/mbbs-companion
If you are in sc/st Category, you have to score 134 marks in the neet exam so that you can be eligible for further process. Just concentrate on the syllabus and prepare for the best so that you can score more than the cutoff, always remember that when you prepare for the 100% then you will able to give your 80% so don't think to score only 134 marks and give your best and score more.