Question about Ellis Island

Hello,

I am looking for relative who immigrated from Dorohoi Romania to US
sometime between 1900-1915. He was married and his family followed him
later.

I know his surname was Schleifer.

I found on Ellis island only one possible candidate (Mortiz)
immigrated 1904 and his age was 24, but it say he was still single.

I am not sure I can read the hand writing as English is not my mother
tongue, can someone have a look at the record?

Did all immigrants come via Ellis island?

In case he's the guy, any advice how do I find his relatives in US?

Roni