Hello.
You are from PCM stream with 87% in class 12th you can opt any course from these many courses like BTech, BSc, BA, BJMC, BBA, etc.
majority of University offers you admission on the basis of their own entrance exam or Central level entrance exam like for BTech there is JEE mains exam and some state level exam too for which 75% it is considered as a good percentage for getting admission even for other courses this much percentage is good one but for colleges which offers you admission on the basis of class 12th merit your high percentage matters, but merit list depend upon the the number of seats and total number of students appeared for the counselling.
So kindly do mention with the university or college.
Best of luck.