il allait comment = how was he?
You can say "Bonjour, comment était ta journée?" in French.
Comment il s'appelle ? means What's his name?
Il allait bien quand je l'ai vu.
Comment est-il? in French means "How is he/it?" in English.
To say "how is he" in French, you would say "comment va-t-il".
"(I) was going for a walk" is "(J')allais me promener" "(He) was going for a walk" is "(Il) allait se promener"
"Il est comment allez-vous" is a grammatically incorrect phrase. "Il est" means "he is" in French, while "comment allez-vous" means "how are you." A correct phrase could be "Comment allez-vous?" which means "How are you?"
"allait-il comment votre jour heir"means nothing. Write: "comment s'est passée votre journée d'hier" or "comment était votre journée d'hier" (informal) and that means "how was your day of yesterday"
Comment va-t-il ?
comment est il allant
How to translated into French is 'comment'. An example sentence is 'Il a demandé comment le faire'. This means 'He asked how to do that'.
"His name is what?" is an English equivalent of the French phrase Il s'appelle comment? The question translates literally as "He calls himself what?" or "He names himself what?" in English. The pronunciation will be "eel sa-pel kuh-maw" in French.