Well, there is no /x/ in International Phonetic Symbols.
How to pronounce /ˈxaːn/?
Context:
Abdul Rashid Salim Salman Khan (born 27 December 1965)[6] better known as Salman Khan (pronunciation : [səlˈmaːn
ˈxaːn]
is an Indian film actor, producer and television personality. Referred to in the media as "The Tiger of Bollywood", "Blockbuster Khan", "Box-office King", he is popularly called as "Bhaijaan" and "Sallu" by his fans.
More:
https://en.wikipedia.org/wiki/Salman_Khan