hello Shushant first of all congrats for the marks that you have obtained.Sorry to say but 

Rajendra Institute of Medical Sciences haven't declared their cutoff for 2019.Until last year, a neet score of 510 was considered a good score to secure a general seat in RIMS, Ranchi via state quota. But considering the unprecedented neet results in 2018, it would not be wise to make predictions until Jharkhand state ranks are out. A Jharkhand state rank below 100 is most likely to fetch you RIMS, Ranchi via state quota (UR).

so here I am attaching a link.please check this out.

http://medicine.careers360.com/neet-college-predictor

hope it helps

Good Luck!