It is obviously not true.
Jeanne Calment lived a very documented life and lived to the age of 122, passing away in 1997.
What? Non-Jewish record keeping is not good enough for you?
How about Yehoyada, a Kohen in the time of the Bayis Sheini who lived to 130?
Either way, it’s clear that there is no absolute 120-year limit in the post-Moshe Rabbeinu era.
The Wolf