Hello student cut off vary every year on various factors like level of question in examination seats available and total nunumber of applicants in the entrance examination and seat available.

If you're expecting around 641 marks in Neet then yes you'll get admission for sure as per previous year records the cut off for girls was 610 last year.

For more details refer to the link mentioned below - https://www.google.com/amp/s/medicine.careers360.com/articles/neet-cutoff-afmc/amp

You can also use careers360 college predictor to predict college its very helpful and easy user friendly.

Refer to the link mentioned below - https://medicine.careers360.com/neet-college-predictor?icn=QnA&ici=qna_answer

Feel free to comment if you've any doubt

Good luck