reorganise“改组，重组；重新安排（整理、整顿）”

“have+宾语+过去分词（宾补）”有三个意思：①让别人做某事；②遭遇到某事；③完成或解决某事。例如：

①You'd better have your chest X-rayed.你最好透视一下胸部。

②Tom has his hand burned.汤姆的手烫了。

③We must have this work finished by Monday.我们一定要在星期一以前完成这项工作。

▲你的问题属第三种情况。句意：如果他们让她进去，她一定会把整个地方重新安排（重组）。