It is not the sea level that is changing. The volume of water on Earth is almost a constant. It is the ground that moves up or down which causes an apparent ‘change’ in sea level.
For instance, that last graph of the sea level change after an EARTHQUAKE.
In some areas of California and Arizona, the land elevation has subsided 15 feet or more in the last 50 years due to water pumping and they are worried that beach is shifting a few fractions of a millimeter every year.
BTW , much of San Francisco sits on land that was part of the bay and under water a century ago but has been reclaimed with land fill.
Parts of the Pilgrim's Plymouth Rock in . Pilgrim Memorial State Park is still in it's original location from 1620 and it is still at the same relative water level that it was in 1620