Us to discuss the average sales for two regions, North and South, given their sales figures.

The sales figures for North are $45, 45, 50, 47, 49$.

$$\text{Sum of North sales} = 45 + 45 + 50 + 47 + 49 = 236$$

There are 5 sales figures for North.

$$\text{Average North sales} = \frac{\text{Sum of North sales}}{\text{Number of sales}} = \frac{236}{5} = 47.2$$

The average sales for the North region are $\text{N}47.2$.

The sales figures for South are $58, 52, 54, 57, 53$.

$$\text{Sum of South sales} = 58 + 52 + 54 + 57 + 53 = 274$$

There are 5 sales figures for South.

$$\text{Average South sales} = \frac{\text{Sum of South sales}}{\text{Number of sales}} = \frac{274}{5} = 54.8$$

The average sales for the South region are $\text{N}54.8$.

Comparing the average sales, the South region has an average of $\text{N}54.8$, while the North region has an average of $\text{N}47.2$. This indicates that, on average, the sales representatives in the South region are performing better than those in the North region.

The average sales for the North region are $\boxed{\text{N}47.2}$ and for the South region are $\boxed{\text{N}54.8}$.