Complex sentence: Instead of dividing by n we can also use sqrt (n) and create this way a similar distribution with a constant variance (like unity); and with substraction of the mean we can set e.g. resulting mean of zero.
Split into simpler sentences: Instead of dividing by n we can also use sqrt (n) and create this way a similar distribution with a constant variance (like unity) can be created. With substraction of the mean we can set the resulting mean of zero.