@skifast12 The atmospheric pressure decreases with height (the weight of the overlying air column lessens as you ascend). It also depends on the meteorological situation. To isolate the meteorological situation pressure by removing the effect of the height on the pressure, meteorologists “correct” the actual pressure to a kind of normalized pressure at sea level (using height, temperature, humidity, …). This allows to compare two pressures measured at different point with different height. It is on this sea-level corrected pressure that the drop is supposed to be computed.
So, if you use an elevator/take an air plane, the real pressure lowers but the corrected sea-level pressure remains mostly the same.
The atmospheric pressure shared by meteorologists in communication medias is the sea-level pressure.