He absolutely did build an 84 win team.
His 4 years, the team won 93, 93, 108 and 84 games. Which of those numbers strikes you as the outlier?
Two of his titles came with 93 win teams and came during a 3 year stretch in which no AL East team won 94 games. In 2018, the Sox went off and won 108 games. But Tampa and NY surged, too, and both continued that success in 2019 while the Sox found them selves plummeting out of competition, middling the postseason by an dozen games, and leading the East in payroll alone. And they didn’t have anyone in the farm system to provide immediate help while a completely f***ed up payroll bogged them down.
This is why it’s odd Dombrowski didn’t know why he was fired. He did basically the same thing in Detroit.
But, hey, 2018! Right?