Hakeem Olajuwon averaged 6.1 blocks per game when playing 10+ games in March 1990.

who was the last player to have 6 bpg in a month with 10 gp in that month
Interpreted as:
Who was the last player to have 6 or higher bpg in a month with 10 or more gp in that month?
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March 1990OlajuwonFebruary 1990RobinsonJanuary 1986BolDecember 1985BolFebruary 1985Eaton6.
Hakeem OlajuwonHakeem OlajuwonMarch 1990166.140.826.
David RobinsonDavid RobinsonFebruary 1990136.337.924.712.
Manute BolManute BolJanuary 1986166.833.
Manute BolManute BolDecember 1985136.428.
Mark EatonMark EatonFebruary 1985136.638.512.713.
StatMuse has game-level data for blocks per game going back to the 1983-84 season.