97.

Would Muhammad have been considered to be a normal human being who needed to repent and ask forgiveness for his sins like everyone else?

Bible: Yes Qur'an: Yes

Ecclesiastes 7:20 – For there is not a just man upon earth, that doeth good and sinneth not. Matthew 3:2 & 82 Repent ye: for the kingdom of heaven is at hand. 8 Bring forth fruits meet for repentance.

Matthew 9:12-13 – Jesus… I am not come to call the righteous, but sinners to repentance.

1 John 1:8 – If we say that we have no sin, we deceive ourselves, and the truth is not in us…

An-Nisa 4:106 – And seek forgiveness of Allah.

Yusuf 12:53 – I do not ever free my own self of blame, the human soul is certainly prone to evil…

Muhammad 47:19 – ask forgiveness for your fault.

Note: Muhammad was not certain of his own salvation: Cf. Ahkaf 46:9; Hadith: Bukhari Vol. 5 no. 266 & 234-236.