Actually several historians now believe Bush would still have lost in ‘92 even without Perot.
It’s hard to remove an incumbent president. Bush 41 simply screwed up.
One good thing about President Bush's sky-high popularity after the Gulf War was that Thurgood Marshall evidently thought that Bush was sure to be re-elected, so he retired from the Supreme Court and Bush was able to pick Clarence Thomas to replace him. If Marshall had stayed on the Court until his death, Clinton would have picked his replacement.
Bush's popularity after the Gulf War may have scared some prominent Democrats out of running, letting Clinton get the nomination.
Though it is purely an academic argument we can never really know...the Perot voters could be polled about who they supposedly ‘would’ have voted for had Perot not been in the race, but even they don’t know that because the campaign without him in the race and it just being Bush and Clinton responding and engaging with each other was never waged to affect their thought processes when election day came around.