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Can anyone figure this puzzle out?

Puzzle:

Shift by 0x83F

Hint 1:

8b9 860 8a0 877 8a4 860 8b7 8b3 8b0 89e 8aa 8b6 87e 8af

Hint 2:

Hint 1 is in UTF-8 in Hex

I was given the puzzle and hints and I know the output is supposed to be a password.

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migrated from stackoverflow.com May 25 '16 at 12:23

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    $\begingroup$ Are you sure the puzzle is only "Shift by 0x83" and the hint is not needed but only augmenting the puzzle?? $\endgroup$ – BmyGuest Jun 15 '16 at 13:28
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They all start with an 8, including the shift. Makes me think it's a question of subtraction. If I convert to decimal and subtract the 0x83F (i.e. 211110) from each of the digits, I get

z!a8e!xtq_kw?p

which is not only UTF-8, it's entirely ASCII.

Can you confirm this password works?

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