This is the 2182nd most frequent Russian word.
восьми
The word "восьми" is the genitive singular or dative singular form of "восемь" (meaning "eight") and translates to "of eight" or "to eight" depending on the context.
The word 'восьми' is used here in the genitive case to denote the time 'until 8'.
Я был дома до восьми часов вечера.
I was home until 8 p.m.
'Восьми' is used in the genitive case because it works together with 'роз' to express quantity.
Она купила букет из восьми роз.
She bought a bouquet of 8 roses.
In this sentence, 'восьми' is in the genitive case modifying 'точек' as part of the subject scope.