Greetings!

Congratulations for your great score ,

BRAVO!

Now the marks and cut off is never constant  so it is hard to say the exact value till the results are out

It depends on external factors like exam difficulty level,amount of students appearing and on internal factors like,your category ,age and score so we can only make a vague idea

Since the level of competition is increasing daily only must have a window of atlest 10 marks up or down the given data 

now coming to self finance colleges it is difficult to determine as it largely depends on your state,your category and also the ratio of number of students to colleges

but looking at last year trends a score above 500 is safe enough,you might still have a chance if you belong from reserved category.

hope this helps

good luck