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More generally, there is no minimal IQ for anything because nothing works as an item with a g loading of 1 (vertical slope). Nevertheless we sometimes put semi arbitrary thresholds for certain decision knowing these to be imperfect but useful (eg military recruits).

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From which dataset is the 85th percentile 1100 vs 1230?

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NLSY97 - 85th percentile is 1230 (tested in 1997-2002 or so)

NLSY79 - 85th percentile is 1100 (tested in 1977-1983 or so)

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The SAT obviously changes a lot every few years so is there still data showing that the modern SAT still correlates with IQ?

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No, unfortunately. Correlation is probably a little lower due to the higher ceiling.

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I mean lower ceiling, but w/e

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