[ what Scrap said plus...]
Some of this has to do with your reach more than your height. Being shorter is not in itself much of a disadvantage (and may have advantages), but it usually comes with shorter arms. A smaller reach can be a significant (but with skill not overwhelming).
Tyson in the early years made good use of being shorter by hitting UP under his larger opponents. Good jabs and movement to get inside and hit up into the chin or straight(er) into the body.
I am just a beginner, but having long arms (5'10 tall, reach 6'3+) it almost always comes as a surprise to my opponents when my punches come in from way out there. Most in fact have shorter arms, even though they are taller, but even those who have similar reach are surprised to see a shorter opponent who can match their reach.
There doesn't however seem to be any reason to adjust stance, good mechanics, etc. -- you fight with the best technique you can manage.
Adapt your tactics and strategy however to emphasize your strengths, hide your weaknesses, and to combat the strengths and prey upon the weaknesses of your opponents (both typical and specific.)
--
HerbM
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