。
Could you please wake me up at 7 tomorrow?
Literal
Tomorrow 7-o'clock [at-に] wake-up humbly-receive can [polite-ますか].
A particularly polite phrasing using いただける (humble potential of もらう). ~ていただけますか is one of the most polite request forms in modern Japanese — literally 'could I humbly receive the action of X?' Common in hotels, offices, and customer service when requesting something important.