22. The smallest number of houses will be in the case where the largest possible percentage of houses having no more than five floors constitutes the smallest number of houses. This is possible if $5 \%$, i.e., $\frac{1}{20}$, part, constitutes one house. Then the total number of houses will be $1 \cdot 20=20$.
22. Of the houses built in one district of the city this year, more than $94 \%$ have more than five floors. What is the smallest possible number of houses in this case?