Yes, it is possible to score above 70% at North Bengal University. I have known people from the university who have scored above 70% and even 80% in their subjects. But it also depends on your subject. If it’s a science subject like Physics, Mathematics, or Computer Science that's achievable. But it’s a little tough for Arts subjects. 

Also, recently NBU started a semester pattern and study. In the semester system, the question pattern was updated and it makes scoring above 80% easy.  

Here is how you can collect your transcripts from North Bengal University.

• Go to the university. Take all your documents like mark sheets, degree certificates, and colored photocopies with you. Get an application form from the university.
• You will have to pay challan for each document. It is around INR 1000 for each. Make a DD in the name of the university and submit it at the counter. 
•  Pin all your documents with the application form and submit them at the counter. 

Your transcripts may take 30 days to get ready. You will have to do follow-up calls to know whether it’s ready or not. You can visit the university to collect your transcripts or get them by courier.