If I rewrite the parts that need to be fixed and the revised draft is better than the draft I submitted previously, would it be possible to get a better score?
ご質問ありがとうございます。
"If I rewrite the parts that need to be fixed"=「もし修正が必要な部分を書き直したら」
"and the revised draft is better than the draft I submitted previously,"=「そして以前私が提出したものよりも良かったら」
"would it be possible to get a better score?"=「もっと良いスコアを取ることは可能でしょうか。」
ご参考に。