There is no problem with your phone's battery.
On average over time, the battery will decline at an average rate of about 1% a month. But, that's an average. Some months it might not decline at all, then drop 2-3% the next month.
Only whole numbers are displayed by the way. It is very possible that your battery really moved from 95% to 94.9%, but this will display as 94% due to the way that Apple rounds the numbers.
So, it looks like your battery declined 1% when it really only declined .1%
A 94-95% reading indicates that your phone is about 5-6 months old. If your phone is older than this, your battery is doing better than normal.
Lucky you if it is.
The simplest way to insure long battery life on your phone:
Enable Optimized Battery Charging on the phone
Never let the battery drop below 10%
Connect the power adapter to the phone at night and leave it connected all night.....every night