。
The results fell far short of the 10 percent target.
Literal
Target [copula-とする] 10 percent [to-には] far [not-reaching-およばない] result [at-に] stayed.
目標とする ('to set as a target') uses とする for role assignment. はるかにおよばない ('far from reaching') combines はるかに ('by far') with 及ばない ('does not reach'). ~にとどまった ('stayed at, was limited to') expresses disappointing scope — the result was capped below expectations. A standard results-reporting construction.