i think 95% is low for an apple notebook that is said to be a brand new, (unrefurbished) MacBook Air.
but its only minimally surprising.
97% or so for a straight out of the box very new laptop is often the case.
battery health % is not the best way to understand if something is odd in this case.
rather, check out the cycle count:
apple/About This Mac/System Report/Power/Battery Information/Health Information/Cycle Count
your (new) device to show it is indeed brand new, should have only a few cycle counts (under 10 or so).