Are there relative pronouns in Chinese
In English, when you say "something/someone, who/which has some characters, is abc/is doing xyz.", after translated to Chinese, usually it will be "some characters的something/someone is abc/is doing xyzor separate to two sentence, "something/someone has some character, (optional: 而且/and) is abc/is doing xyz."

In your sample, in addition to @user3919509's answer, you can also say "那个正往店铺走的男子很高". Since "The man" could be anyone, in this case you want to add "該名/那个". In another case, if everybody knows the man, say, we have his name, it will be little different. For example, "Tom, who is working in a big company, has two kids", you can say "汤姆在一个大公司工作，有两个小孩。“

Hope this helps.