I am a 248 days / 8 months, 1 week & 1 day old baby
A sneezing baby is normal. I bet you did not expect that. All new born babies sneeze to clear their nose. This is because they are what we call "obligate nose breathers." They sneeze to clear their nose; however, repetitive sneezing suggest you should suction the nose.[1]
Having a stuffy nose or occasionally sneezing is very common in newborns and is usually caused by irritation from dry air, smoke, or dust. Try to eliminate common irritants. You can also try using a humidifier or salt water nose drops as treatment.[2]
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Notes:
[1] askdrtrotter.com
[2] keepkidshealthy.com