Found this...
The oldest person in the Bible was Methuselah at 969 years, then later God lowered the average life span to 120 years (Moses died at 120), and then even lower to our current average of 70 to 80 years--and this because of the increasing wickedness of mankind.
Adam lived 930 years, and then he died. [Genesis 5:5]
Seth lived 912 years, and then he died. [Genesis 5:8]
Enosh lived 905 years, and then he died. [Genesis 5:11]
Kenan lived 910 years, and then he died. [Genesis 5:14]
Mahalalel lived 895 years, and then he died. [Genesis 5:17]
Jared lived 962 years, and then he died. [Genesis 5:20]
Methuselah lived 969 years, and then he died. [Genesis 5:27]
Lamech lived 777 years, and then he died. [Genesis 5:31]
Then the LORD said, "My Spirit will not contend with man forever, for he is mortal; his days will be a hundred and twenty years." [Genesis 6:3]
"The length of our days is seventy years - or eighty, if we have the strength; yet their span is but trouble and sorrow, for they quickly pass, and we fly away." [Psalm 90:10]
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