Revaluation marksheet

How do I get my revaluated marksheet.my school has said that cbse regional office will send it to my house,but they have not taken my old marksheet

One more thing I also gave improvement I have crossed 75% criteria,with revaluation marksheet my percentage is 77, without revaluation marksheet my percentage is 76.4

So is it okay if i use my old marksheet?

Btw allahabad region