Spot on with the math.
You should put a value of 8 in EAC for the offset correction value.
+2 is the offset of the disc itself (this is a very common value). We also have to account for the offset of the drive, so we add the two together to get the "combined offset".
Let's pretend you had a drive with a negative offset, like -444. We wouldn't see garbage data in this drive, but if we figure out the combined offset with our disc offset (-444 + 2), we would know to use -442. Likewise, if you had a +667 drive, you could find large negative offsets, and figure out what to use in your SH-S223L by adding 6.
[It should be noted that combined negative offsets can give bad results in EAC, so in that case you will want to dump manually or use a tool like PerfectRip (tutorial)]