Isn't the standard account of the course of the dollar that Americans bought too many foreign goods with their artificially high dollar, suffering because the Chinese Renminbi was artificially pegged to the dollar? I seem to remember that there was a big outcry when G.W. Bush decided to let it slide.
Presumably the dollar, if allowed to find its own level would slide relative to the Renminbi, (but not necessarily relative to the Euro) so that Americans would lose some purchasing power, while U.S. producers for foreign and domestic markets would be more competitive: net transfer of wealth from wage-earners to manufacturers.