Thanks for your question.
Psalm 90:10 The days of our years are threescore years and ten; and if by reason of strength they be fourscore years, yet is their strength labour and sorrow....
In the King James Version, a "score" is 20. So, in this verse, threescore and ten years is seventy years and fourscore is eighty.
Here is this same verse in the New King James Version:
Psalm 90:10 The days of our lives are seventy years; And if by reason of strength they are eighty years, Yet their boast is only labor and sorrow....
I hope you have found this helpful.