Most of them 40 years ago. Draft changed a lot since then.
He wasn't 6th round
I think you need to actually check things out before posting because both things you said are wrong (again).
Keith Acton: 46 years ago (1978)
Mike McPhee: 44 years ago (1980)
Donald Dufresne: 39 years ago (1985)
Craig Conroy: 34 years ago (1990)
Oleg Petrov: 33 years ago (1991)
Darcy Tucker: 31 years ago (1993)
Brett Clark: 28 years ago (1996)
Andrei Markov (162nd overall, 6th round): 26 years ago (1998)
Matt D'agostini: 19 years ago (2005)
Michael Pezzetta: 8 years ago (2016)