Ideal Temperature of Mac Air 2017

Hey you guys. I'm a user of Mac Air 2017. I use "coconutbattery" application to observe my battery health. I've played Football Manager 2020 for one month and suddenly my battery health dropped to 98.5% (cycle count is 68) from 100%. And also my batter temperature approximately 90 F always.

Are this things okay? I concern about if I did something wrong.