This is the figure of a man with his hand raised in greeting. The man's occupation is that of a greeter. Hence, this is the noun greeter.
Illustrative Motif Reference:
Mohenjo-daro: Tablet: M-2021A: Asko Parpola, B. M. Pande, and Petteri Koskikallio, 2010: Corpus of Indus Seals and Inscriptions: Volume 3,1: Page 104: New material, untraced objects, and
collections outside India and Pakistan: Suomalainen Tiedeakatemia.
Greeters were people who met with incoming boats and caravans to offload their wares.