maybe if he spoke the language, which at that time ran into thousands in a country like kenya, that didnt exist, ootherwise your lijely to be killed anyway for being in the wrong place. all places of course being wrongGood point. The question dosent specify the location you are arriving at though. If its South Carolina yea being a tall black guy may create just a few problems you may not want to deal with! However if your placed in Nigeria or Kenya you could fare much better.
Make things real interesting you could be dropped somewhere in Asia in 1720. Not sure how familiar black people would have been to the common Chinese peasant. Be a good test of your Wing Chun skills! lol
languidge generally is a major problem as even english would be mostly unrecognidable to you, if you dropped into an english speaking country,