Anyone familiar with how credit cards impact credit scores?

My husband is an authorized user on two of my credit cards that are maxed out (98% of $4500 and 96% of $9500). If we remove him as authorized users and those get taken off of his credit report, should his score go up? He has one at 91% and at 11%. The 91% only has a $500 limit and can be paid off in a month or two. The other has around $450 of $4000 utilized.

Thanks for the info, everyone! We never had maxed out credit cards or even close to having them maxed out until the last couple months. My husband got laid off for a bit and we are glad we had something to fall back on. We will be paying it all off as quickly as possible, I was just wondering if removing him as an authorized user would avoid tanking his credit score for the time being. It went down about 65 points.