All the days follows the pattern established in 5.5, 8, 11, 14, 17, and so on. See 5.5 for discussion. And he died brings the flood story to a final close.
Quoted with permission from Reyburn, William D. and Fry, Euan McG. A Handbook on Genesis. (UBS Helps for Translators). New York: UBS, 1997. For this and other handbooks for translators see here .